I received an online referral from my friend in November.

Subsequently, I got an email from HR asking for suitable dates. I provided one for the first week of December.

I then received a call from the Hiring Manager. He briefed me about the position and asked about a specific project relevant to the role. The conversation went well and lasted for 30 minutes.

At the end of the call, he informed me about another interview with an engineer.

After waiting, I finally received an email after one week from HR notifying me of the second interview on December 17th.

The second phone interview went pretty well as the interviewer was extremely cheerful. During this interview, he asked me to describe specific details of different projects I worked on as part of my coursework. He also asked me about some basic data structures to check my awareness of them.

Two days after that, I received a phone call from HR informing me about the offer, which was really unbelievable.

Concentrate on the basics of data structures and projects.